package com.sen.gulimall.cart.controller;

import com.sen.gulimall.cart.service.CartService;
import com.sen.gulimall.cart.vo.Cart;
import com.sen.gulimall.cart.vo.CartItem;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.List;
import java.util.concurrent.ExecutionException;

/**
 * @author Kisen
 * @email lqs0911@qq.com
 * @date 2022/11/13 13:21
 * @detail
 */
@Controller
public class CartController {

    @Autowired
    private CartService cartService;

    @GetMapping("currentUserCartItems")
    @ResponseBody
    public List<CartItem> getCurrentUserCartItems() {
        return cartService.getUserCartItems();
    }

    @GetMapping("deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId) {
        cartService.deleteItem(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("countItem")
    public String countItem(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num) {
        cartService.changeItemCount(skuId, num);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("itemCheck")
    public String itemCheck(@RequestParam("skuId") Long skuId, @RequestParam("check") Integer check) {
        cartService.itemCheck(skuId, check);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 浏览器有一个cookie:user-key;标识用户身份，一个月后过期；
     * 如果第一次使用jd的购物车功能，都会给一个临时的用户身份。
     * 浏览器以后保存，每次访问都会带上这个cookie；
     * 登录：session有
     * 没登录：按照cookie里面带来user-key来做。
     * 第一次：如果没有临时用户，帮忙创建一个临时用户。
     *
     * @return
     */
    @GetMapping("cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {

        Cart cart = cartService.getCart();
        model.addAttribute("cart", cart);

        return "cartList";
    }

    /**
     * 添加商品到购物车
     * RedirectAttributes ra
     * ra.addFlashAttribute():将数据放在session里面可以在页面取出，但是只能取一次
     * ra.addAttribute("skuId", skuId);将数据放在url后面
     *
     * @return
     */
    @GetMapping("addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num,
                            RedirectAttributes ra) throws ExecutionException, InterruptedException {

        cartService.addToCart(skuId, num);
        ra.addAttribute("skuId", skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccessPage.html";
    }

    @GetMapping("addToCartSuccessPage.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId, Model model) {
        //重写到成功页面，再次查询购车数据即可
        CartItem item = cartService.getCartItem(skuId);
        model.addAttribute("item", item);

        return "success";
    }
}
